Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 327 AM EST Thu Dec 11 2014 Valid 12Z Thu Dec 11 2014 - 12Z Sat Dec 13 2014 ...Heavy rain possible over California... ...Heavy snow possible over the Sierras... ...Temperatures will be 15 to 25 degrees above average for the Northern/Central High Plains and Northern Rockies... A storm an associated front off the West Coast will move inland to the Northern Rockies/Great Basin and the Southwest by Friday evening. The system will pull a plume of moisture into California that will produce moderate to heavy rain over Northern California and parts of the Pacific Northwest that will move southward to Southern California by Friday morning. The rain will wane to light rain along the West Coast by Friday evening. Moderate snow will develop over the Sierras late Thursday night into Friday morning, waning to light snow by Friday evening. A band of moderate to heavy rain will move farther inland, on Friday evening, to parts of the Great Basin/Southwest, with an area of light to moderate rain over the Northern Intermountain Region. Snow will also develop over parts of the Northern Rockies by Friday evening, too. Meanwhile, deep storm over the Northeast will slowly weaken and move out over the Western Atlantic by Friday evening. The system will produce light snow over parts of the Northeast that will wane to a band over parts of the Northern Appalachians by Friday. Light rain will develop over parts of New England Coast ending on Friday morning. Elsewhere, upper-level energy and moisture flowing northward from the Western Gulf of Mexico will produce rain with embedded thunderstorms over parts of the Southern Plains into parts of the Lower Mississippi Valley on Thursday and Wednesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php